Seiko Turtle Diver (Ref. 6306-7000) "JDM", 1976

Dealer description — Craft & Tailored

The Seiko 6306-7000 is a short-lived and highly collectable variant of Seiko’s third-generation professional diver, produced exclusively for the Japanese Domestic Market in 1976. Manufactured for an extremely brief period, only several months in 1976, before being replaced with the 6306-7001, it stands as one of the more elusive executions within the Turtle lineage. Often regarded as the refined counterpart to export models like the 6309, the 6306 is fitted with an upgraded automatic movement featuring hacking seconds and a higher jewel count—subtle but meaningful enhancements that set it apart for collectors. Housed in the classic “Turtle” case, the watch measures 45mm in diameter, 48mm lug-to-lug, and 13mm thick, with a 22mm lug width. The case design is quintessential Seiko tool-watch: circular brushing across the top, polished flanks and caseback, and a defined mid-case line that adds visual depth. A screw-down crown positioned at 4 o’clock ensures both water resistance and comfort on the wrist. Additional details include a double-row knurled bezel for improved grip, a bold and highly legible handset, and a quick-set day/date complication. Durable, functional, and purpose-built, the 6306-7000 represents a pivotal moment in Seiko’s dive watch evolution. Seiko divers of this era also carry notable cultural significance, with related models appearing on the wrists of figures like Ed Harris in The Abyss and Mick Jagger. While many examples have seen extensive use, this piece remains in excellent, original condition—an increasingly scarce find among vintage Seiko divers. SPECS Stock # SKO63067000 Brand Seiko Style Diver Model 6306-7000 Serial 67XXXX Size Men's Material Stainless Steel Dial Matte Black Millimeters 45 Strap Phoenix NATO Strap CASE & BRACELET The robust and large case retains strong factory dimensions, with gentle signs of use and minimal evidence of prior polishing present. The original bezel insert exhibits minor signs of use and retains the luminous pearl. The original screw-down crown is located at 4 o'clock. The case back retains all of its original factory engravings and markings in deep and legible condition. The watch comes supplied on a black Phoenix NATO strap DIAL & HANDS The matte black dial is in perfect condition, showing no damage or notable elements of age. The lume plots have taken on a charming creamy patina and show no degradation when inspected under UV light. The original lume hands have maintained a pale gray coloration and exhibit no degradation when inspected under UV light. ACCESSORIES None. The watch is keeping time, but the service history is unknown. A movement service can be provided upon request.